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Recovery of Chromium(III) from Tannery Wastewater by Nanoparticles and Whiskers of Chitosan

机译:纳米壳聚糖晶须从制革废水中回收铬(III)。

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摘要

Chitosan, its nanoparticles and whiskers present an excellent capacity to complex chromium ions. However, this phenomenon is influenced by different parameters. In our search, we determined the appropriate range of pH to form chitosan-Cr(III), nanoparticles Cr(III) and whiskers-Cr(III) complex. We studied also the influence of chromium concentration and nature of chitosan-based materials on complexation process. Our main aim is approximate the optimal conditions to remove chromium(III) from tanning bath, recuperated from tannery wastewater of Marrakech in Morocco. However, the results of adsorption kinetic in tannery wastewater revealed that chitosan, its nanoparticles, whiskers and biocomposites are good sorbent of chromium as well, even if the adsorbed quantity is less compared to chromium solution. Although, according to ICP-OES analysis in this real effluent, nanoparticles are the best complexing ligand, after 24 h of contact nanoparticles can remove 70% of chromium from this tannery wastewater.
机译:壳聚糖,其纳米颗粒和晶须具有出色的络合铬离子的能力。但是,此现象受不同参数的影响。在我们的搜索中,我们确定了合适的pH范围以形成壳聚糖-Cr(III),纳米颗粒Cr(III)和晶须-Cr(III)络合物。我们还研究了铬浓度和壳聚糖基材料的性质对络合过程的影响。我们的主要目标是确定从摩洛哥马拉喀什制革废水中回收的鞣革浴中去除铬(III)的最佳条件。然而,制革废水中吸附动力学的结果表明,即使吸附量比铬溶液少,壳聚糖,其纳米粒子,晶须和生物复合物也对铬具有良好的吸附性能。尽管根据ICP-OES分析,在这种实际废水中,纳米颗粒是最好的络合配体,但接触纳米颗粒24小时后,可以从该制革废水中去除70%的铬。

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